MessageKit/Sources/MessagesCollectionViewLayoutAttributes.swift

/*
 MIT License
 
 Copyright (c) 2017 MessageKit
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
 in the Software without restriction, including without limitation the rights
 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 copies of the Software, and to permit persons to whom the Software is
 furnished to do so, subject to the following conditions:
 
 The above copyright notice and this permission notice shall be included in all
 copies or substantial portions of the Software.
 
 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 SOFTWARE.
 */

import UIKit

final class MessagesCollectionViewLayoutAttributes: UICollectionViewLayoutAttributes {

    // MARK: - Properties

    var messageContainerSize: CGSize = .zero
    var messageLabelFont: UIFont = UIFont.preferredFont(forTextStyle: .body)
    var messageLabelInsets: UIEdgeInsets = UIEdgeInsets(top: 7, left: 14, bottom: 7, right: 14)
    var messageToViewEdgePadding: CGFloat = 30.0

    var cellTopLabelSize: CGSize = .zero
    var cellTopLabelInsets: UIEdgeInsets = .zero
    var topLabelExtendsPastAvatar = false

    var cellBottomLabelSize: CGSize = .zero
    var cellBottomLabelInsets: UIEdgeInsets = .zero
    var bottomLabelExtendsPastAvatar = false

    var avatarSize: CGSize = CGSize(width: 30, height: 30)
    var avatarPosition: AvatarPosition = .cellBottom
    var avatarMessagePadding: CGFloat = 4.0

    var direction: MessageDirection = .incoming

    // MARK: - Methods

    override func copy(with zone: NSZone? = nil) -> Any {
        // swiftlint:disable force_cast
        let copy = super.copy(with: zone) as! MessagesCollectionViewLayoutAttributes
        copy.messageContainerSize = messageContainerSize
        copy.messageLabelFont = messageLabelFont
        copy.messageLabelInsets = messageLabelInsets
        copy.messageToViewEdgePadding = messageToViewEdgePadding
        copy.cellTopLabelSize = cellTopLabelSize
        copy.cellTopLabelInsets = cellTopLabelInsets
        copy.topLabelExtendsPastAvatar = topLabelExtendsPastAvatar
        copy.cellBottomLabelSize = cellBottomLabelSize
        copy.cellBottomLabelInsets = cellBottomLabelInsets
        copy.bottomLabelExtendsPastAvatar = bottomLabelExtendsPastAvatar
        copy.avatarSize = avatarSize
        copy.avatarPosition = avatarPosition
        copy.avatarMessagePadding = avatarMessagePadding
        copy.direction = direction
        return copy
        // swiftlint:enable force_cast
    }

    override func isEqual(_ object: Any?) -> Bool {

        // MARK: - LEAVE this as is
        // swiftlint:disable unused_optional_binding
        if let _ = object as? MessagesCollectionViewLayoutAttributes {
            return super.isEqual(object)
        } else {
            return false
        }
        // swiftlint:enable unused_optional_binding
    }
}